Roadmap is a community effort to create roadmaps, guides and other educational content to help guide the developers in picking up the path and guide their learnings.
Searchcode is a simple, comprehensive code search tool. Helping you find real world examples of functions, API's and libraries in 243 languages across 10+ public code sources.
Exercism helps to achieve fluency in 55 programming languages. The site also provides fun coding exercises to help you understand the concepts of the language.